Improved chair-spring



iinitd .glatte @anni Wine TURNER O. IURINGTON, OF LIN OOLN ASSIGNOR TOHIMSELE AND ANTOINE MAYOUX, OF MARYSVILLE, OALIFORN IA.

Letters Patent No. 97,314, dated November 30, 1869.

IMPROVED CHAIR-SPRING.

The Schedu1e-referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, TURNER C. PURINGTON, ofLincoln, in the county of Placer, and State ot' California, haveinvented a certain new and improved Chair-Spring; and I do herebydeclare that the following is a full and exact description oi' thesaine, reference being had to the accompanying drawings, and to theletters of reference marked thereon.

My invention relates toa certain improvement in attaching the ordinaryspiral springs to the two front legs of a chair, whereby rockers areentirely dispensed with.

In the drawings- Figure l is an elevation of the spring, with one legi-u position in the nut or step.

Figure 2 is a bottom view.

Figure 3 is a vertical section of nut.'

The nut A is made of metal, and is provided with a screw-thread, B, sothat it can be screwed to the leg of an ordinary chair, and instead ofweakening and splitting the leg, as in case where a hole is bored and ascrew inserted to hold and attaclrthe step, my mode of attaching the nutor step serves to strengthen it.

'The nut can also be easily and quickly removed, and the chair be madeto assume the ordinary posit-ion again, standing'v ou four legs.

The ease and convenience in applying the spring to the nut will bereadily seen and appreciated. \Vith this end in view, I provide the topoi' the nut with a colla-r or shoulder, (l, and make a half f ovalspiral or incline groove, D, around the outer surface of the nut,commencing at the base, so that by insertingr the small end of thespiral spring E in the groove, and turning it around, the top coil ofthe springr `will rest rmly in the upper part oi' the groove, nnler theshoulder or lip 'of the nut, and thus prevent doubling or oscillatingfrom side to side, and the chair will resume all the soft andyielding-motion imparted to it hy the 'nearing down of the springs.

Having thus described my invention,

What I claim, and desireI tosocnre by Letters Patent, is In combinationwithv the spiral spring, the nut A, provided with an inner screw-thread,B, outer inclinogroove D, and shoulder substantially as and for thepurpose set forth.

In witness whereof, I have hereunto set my hand and seal.

TURNER O. IURINGTON. [11. s] Witnesses:

C. W. M. SMITH, E. V. SUTTER.

